The first real clue as to the nature of the next Star Wars film has emerged after studio Disney released a casting breakdown to Hollywood agents for the much-hyped project.

The profiles are said to match those of the lead roles for JJ Abrams's Star Wars: Episode VII, which is due to shoot in the UK early next year. The Star Trek director is reportedly looking for actors to play a "young man aged between 20 and 25, witty and smart, fit but not classically handsome", a "late teenage girl [sic], independent, good sense of humour, also … physically fit" and a "second young female, also late teens, tough, smart and physically fit". Further calls have gone out for a "man in his 40s, obviously physically fit, this one is a military type", plus a "man of around 30 or so, this one is an intellectual type", and finally a "guy aged around 70, strong opinions and tough".

The two young female roles tally with rumours that Michael Arndt's screenplay for the new film might feature a female central protagonist for the first time in a Star Wars film. The casting-breakdown scoop was first mentioned by US fan site Schmoesknow, but Deadline came up with a more detailed description. Schmoesknow also published a rumour last week that Episode VII might feature twin Jedi teens Jacen and Jaina Solo, son and daughter of Han Solo and Princess Leia, who are trained by their uncle Luke Skywalker in the ways of the Force.

Star Wars: Episode VII is scheduled to arrive in cinemas in 2015, with sequels following in 2017 and 2019. Disney bought the rights to the long-running space saga for $4.05bn in October last year. The film instalment in the new trilogy is expected to feature Mark Hamill, Harrison Ford and Carrie Fisher returning to their original roles of Skywalker, Solo and Leia.

Beloved characters such as Yoda, Solo and Boba Fett have also been tipped to receive their own standalone movies, which could squeeze into cinemas during gaps between release dates for the new triptych. The spin-off films are rumoured to be set within the timeline of the original Star Wars films released between 1977 and 1983.